diff --git a/demo-parent/demo-grpc-server/pom.xml b/demo-parent/demo-grpc-server/pom.xml
index e8a603d..e7bddec 100644
--- a/demo-parent/demo-grpc-server/pom.xml
+++ b/demo-parent/demo-grpc-server/pom.xml
@@ -56,7 +56,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>27.0.1-jre</version>
+            <version>29.0-jre</version>
         </dependency>